CN110406134A - A kind of method of forming carbon fiber reinforced thermolplastic composite material part - Google Patents
A kind of method of forming carbon fiber reinforced thermolplastic composite material part Download PDFInfo
- Publication number
- CN110406134A CN110406134A CN201910707800.XA CN201910707800A CN110406134A CN 110406134 A CN110406134 A CN 110406134A CN 201910707800 A CN201910707800 A CN 201910707800A CN 110406134 A CN110406134 A CN 110406134A
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- Prior art keywords
- carbon fiber
- fiber reinforced
- composite material
- forming
- plate
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- 239000002131 composite material Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 32
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 16
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 23
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 13
- 238000000465 moulding Methods 0.000 claims abstract description 12
- 238000007493 shaping process Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000002791 soaking Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 6
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 5
- 229920002530 polyetherether ketone Polymers 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 239000002023 wood Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 230000006378 damage Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000002708 enhancing effect Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003856 thermoforming Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009745 resin transfer moulding Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
A kind of method of forming carbon fiber reinforced thermolplastic composite material part, the present invention relates to a kind of manufacturing process of fibre reinforced thermoplastic composite.It solves the problems, such as that the stamping needs of the prior art take a significant amount of time and the energy.It is realized by following step: fibre reinforced Thermoplastic Laminates being heated rapidly to critical forming temperature, the rate of heat addition is within the scope of 20-60 DEG C/s;Plate is kept the temperature under a certain pressure;Hot sheet is quickly transferred in cold mold, hot plate material is in soft state always;The pressure of plate cold mold is struck out into required shape;And drip molding is quenched to by room temperature with critical hardening rate.The invention proposes a kind of new quick thermo shaping methods, can be used for producing complex-shaped enhancing thermoplastic composite part.Meet the requirement produced in enormous quantities in auto industry for part, can will shorten to the production cycle within 15 seconds.The intensity of drip molding can reach the 90% of former plate property.
Description
Technical field
The present invention relates to a kind of manufacturing process of fibre reinforced thermoplastic composite, belong to composite formed neck
Domain.
Background technique
Fibre reinforced thermoplastic composite has extensive in the application of aerospace, aircraft and auto industry
Produce the potentiality of lightweight construction component.Currently, high-pressure resin transfer modling shapes (High Pressure Resin Transfer
Moulding manufacture enhancing thermoplastic composite auto parts and components) are applied to.However, due in the technology injection and
The solidification process duration is longer, it is desirable to carry out large-scale production using the technology and have very big difficulty.In the art, make
Enhancing Thermoplastic Laminates are carried out with convection furnace or infrared heating heating furnace stamping, required a great deal of time and energy
Source.If the production cycle of thermoplastic composite part process can be foreshortened within 1 minute, carbon fibre reinforced composite
It will be more widely used in automobile lightweight construction component, to reach mitigation weight, reduce the purpose of cost.
Summary of the invention
The present invention provides a kind of method of forming carbon fiber reinforced thermolplastic composite material part, to solve the prior art
Stamping needs take a significant amount of time and the problem of the energy.The present invention is realized by following step:
One, fibre reinforced Thermoplastic Laminates are heated rapidly to preset temperature, which is critical forming
Temperature T, the rate of heat addition is within the scope of 20-60 DEG C/s;
Two, plate is kept the temperature under a certain pressure;
Three, hot sheet is quickly transferred in cold mold, hot plate material is in soft state always;
Four, the pressure of plate cold mold is struck out into required shape;And drip molding is quenched with critical hardening rate
To room temperature.
The invention proposes a kind of new quick thermo shaping method, this method can be used for producing in enormous quantities complex-shaped increasing
Heat-flash plastic composites part.Thermoplastic composite of the present invention is the material for preferably comprising matrix and reinforcement.For
Meet the requirement produced in enormous quantities in auto industry for part, the present invention provides a kind of production work of low-energy-consumption high-efficiency
Skill can will shorten within 15 seconds the production cycle.By carrying out the quick hot forming experiment of thermoplastic composite, the technology
Feasibility verifying has been obtained.Drawn experimental test, the intensity of drip molding can achieve the 90% of former plate property.
The technology forming process be between plate and cold mold under non-isothermal condition by fibre reinforced thermoplastic composite
Plate stamping is at required geometry.Thermoplastic Laminates are heated using high-power contact-type heating device first
To temperature appropriate, which is slightly below resin melt temperature.The contact heating device may be implemented the rate of heat addition be up to 60 DEG C/
S's is rapidly heated, and can significantly shorten the time of heating composite board.With will heat and softened composite wood
Flitch is quickly transferred in shaping dies, then applies certain pressure in cold mold, needed for composite board is struck out
Part, and room temperature can be quenched into the rate of temperature fall of 30 DEG C/s.
The part strength that the present invention shapes has reached performance before the thermoplastic composite material board material thermoforming after tested
90%.With conventional thermoplastic's composite board forming compared with, present invention reduces in forming process to thermoplastic composite material
The time of material heating and heat preservation, so that production efficiency can not only be improved, energy-saving effect is also very significant.It is related in forming process
Heating, heat preservation, transfer, forming, quenching process total production cycle can foreshorten within 15 seconds, generally at 15 to 30 seconds, slightly
It is long then be 60 seconds, no longer than 120 seconds.
Detailed description of the invention
Fig. 1 is the temperature curve and schematic diagram of quick thermoformed carbon-fibre enhancing thermoplastic composite;Fig. 2 is carbon fiber
Tie up the U-shaped formed parts picture of reinforced polyether ether ketone composite material (CF/PEEK);Fig. 3 is the stretching examination of molded part and raw material
Test stress-strain curve.
Specific embodiment
Specific embodiment 1: illustrating present embodiment below with reference to Fig. 1, the manufacturing process of part passes through following step reality
It is existing:
One, fibre reinforced Thermoplastic Laminates are heated rapidly to preset temperature, which is critical forming
Temperature T is slightly below the resin melt temperature of Thermoplastic Laminates.The rate of heat addition is within the scope of 20-60 DEG C/s.Heating
The selection of rate and forming temperature depends on the complexity of drip molding.
Critical forming temperature T can be used to determine using the following method: plate is heated to after different temperatures to material items
Performance compares, to determine material melt temp, it is ensured that material has softened enough before forming.For plastics, rubber
The melting temperature of equal materials, laboratory generallys use differential scanning calorimeter (i.e. DSC) and measures.The instrument passes through thermocouple
The variation of collection material hot-fluid during lifting/lowering temperature, is depicted as curve, since material can largely absorb heat in fusing point, curve
Occurs sharp peak here, peak temperature is the material melt temp.
Two, after plate is heated to preset temperature, it is kept the temperature under a certain pressure.With traditional hot forming composite material phase
Than soaking time needed for the invention is extremely short.
Soaking time determines using the following method: surface characteristics of the comparison plate after different soaking times, to avoid keeping the temperature
Overlong time or the too short destruction for material surface characteristic guarantee the outstanding surface quality of formed parts.
Three, hot sheet is quickly transferred in cold mold, hot plate material in the temperature of plate not less than before required forming temperature
Always it is in soft state.
Passing time of the plate from heating equipment to shaping dies is determined using the following method: by test of many times and data board
The temperature-fall period being placed in air is taken out in the slave heating equipment of material, determines the time.
Four, required shape will be struck out under the pressure of plate cold mold.And drip molding is quenched with critical hardening rate
Fire is to room temperature.
It determines required forming pressure and critical hardening rate using the following method: testing and compare in different quenching rates
Under forming pressure, the properties and surface characteristic of drip molding guarantee the outstanding surface quality of formed parts.
Specific embodiment 2: illustrating present embodiment below with reference to Fig. 1, Fig. 2 and Fig. 3.Present embodiment and tool
One difference of body embodiment is that the selection fibre reinforced of the fibre reinforced thermoplastic composite in present embodiment is poly-
Ether ether ketone (CF/PEEK) composite material.The part is " u "-shaped component, is the part for automobile.Composite material plate thickness
2.5mm。
Step 1 uses high-power contact-type heating device, which may be implemented the rate of heat addition and be up to 60
DEG C/s is rapidly heated, heating time can reach critical forming temperature T between 3 seconds to 5 seconds.The soaking time of step 2,
Between between 0.5 second to 2 seconds.The cool time of step 4 is 6 seconds to 8 seconds, reaches the rate of temperature fall of 40 DEG C/s.
After taking above-mentioned measure, the entire production cycle was shortened within 15 seconds.After tested, the part strength of forming reaches
The 91% of performance before the thermoplastic composite material board material thermoforming.Fig. 3 shows the drawing of part part and raw material after molding
Proof stress-strain curve is stretched almost to be overlapped.
Other steps are same as the specific embodiment one.
Specific embodiment 3: present embodiment defines in step 2 relative to embodiment two, mold dwell pressure
In critical contact pressure limit, mold dwell pressure is 1MPa to 20MPa;The quenching of step 4 is drip molding in cold mold
It is cooling.
Other steps are identical with embodiment two.
Claims (10)
1. a kind of method of forming carbon fiber reinforced thermolplastic composite material part, it is characterised in that it passes through following step reality
It is existing: one, fibre reinforced Thermoplastic Laminates are heated rapidly to preset temperature, which is critical forming temperature T,
The rate of heat addition is within the scope of 20-60 DEG C/s;
Two, plate is kept the temperature under a certain pressure;
Three, hot sheet is quickly transferred in cold mold, hot plate material is in soft state always;
Four, the pressure of plate cold mold is struck out into required shape;And drip molding is quenched to by room with critical hardening rate
Temperature.
2. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 1, feature exist
Can be used to determine using the following method in critical forming temperature T: plate is heated to after different temperatures to material properties into
Row comparison, to determine material melt temp, it is ensured that material has softened enough before forming.
3. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 1, feature exist
It is determined using the following method in soaking time: surface characteristics of the comparison plate after different soaking times, to avoid soaking time mistake
The long or too short destruction for material surface characteristic guarantees the outstanding surface quality of formed parts.
4. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 1, feature exist
In using the following method determine passing time of the plate from heating equipment to shaping dies: pass through test of many times and record plate from
The temperature-fall period being placed in air is taken out in heating equipment, determines the time.
5. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 1, feature exist
In determining required forming pressure and critical hardening rate using the following method: testing and compare in different quenching rates and forming
Under pressure, the properties and surface characteristic of drip molding guarantee the outstanding surface quality of formed parts.
6. according to claim 1 to a kind of forming carbon fiber reinforced thermolplastic composite wood described in any one of 5 claims
Expect the method for part, it is characterised in that fibre reinforced thermoplastic composite selects carbon fiber reinforced polyether-ether-ketone composite wood
Material, the part are " u "-shaped component, composite material plate thickness 2.5mm.
7. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 6, feature exist
High-power contact-type heating device is used in step 1, which may be implemented the rate of heat addition and be up to the fast of 60 DEG C/s
Speed heating, heating time can reach critical forming temperature T between 3 seconds to 5 seconds;The soaking time of step 2, extremely at 1.2 seconds
Between 1.5 seconds;The cool time of step 4 is 7 seconds to 8 seconds, reaches the rate of temperature fall of 30 DEG C/s.
8. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 7, feature exist
In step 2, for mold dwell pressure in critical contact pressure limit, mold dwell pressure is 1 MPa to 20 MPa.
9. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 7, feature exist
It is that drip molding is cooling in cold mold in the quenching of step 4.
10. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 1, feature exist
Then it is used for the part of automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910707800.XA CN110406134B (en) | 2019-08-01 | 2019-08-01 | Method for forming carbon fiber reinforced thermoplastic composite material part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910707800.XA CN110406134B (en) | 2019-08-01 | 2019-08-01 | Method for forming carbon fiber reinforced thermoplastic composite material part |
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| Publication Number | Publication Date |
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| CN110406134A true CN110406134A (en) | 2019-11-05 |
| CN110406134B CN110406134B (en) | 2021-08-13 |
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